import { useEffect } from "react";
import { useForm, Controller } from "react-hook-form";
import { z } from "zod";
import { zodResolver } from "@hookform/resolvers/zod";
import type { Expense } from "@/lib/api";
import { useExpensesContext } from "../ExpensesProvider";
import { DatePicker } from "@/components/ui/date-picker";
import {
  ResponsiveDialog,
  ResponsiveDialogContent,
  ResponsiveDialogHeader,
  ResponsiveDialogTitle,
  ResponsiveDialogFooter,
} from "@/components/ui/responsive-dialog";
import { Button } from "@/components/ui/button";

const paySchema = z.object({
  amountPayed: z.number().positive("El monto debe ser mayor a 0"),
  paymentDate: z.date({ message: "La fecha es obligatoria" }),
});

type PayFormValues = z.infer<typeof paySchema>;

interface PayExpenseDialogProps {
  expense: Expense | null;
  open: boolean;
  onOpenChange: (open: boolean) => void;
}

export function PayExpenseDialog({ expense, open, onOpenChange }: PayExpenseDialogProps) {
  const { payExpense } = useExpensesContext();

  const {
    register,
    handleSubmit,
    control,
    formState: { errors, isSubmitting },
    reset,
  } = useForm<PayFormValues>({
    resolver: zodResolver(paySchema),
    defaultValues: {
      amountPayed: 0,
      paymentDate: undefined,
    },
  });

  useEffect(() => {
    if (expense) {
      reset({
        amountPayed: Number(expense.amount),
        paymentDate: new Date(),
      });
    }
  }, [expense, reset]);

  function handleClose(open: boolean) {
    onOpenChange(open);
    if (!open) reset();
  }

  async function onSubmit(data: PayFormValues) {
    if (!expense) return;
    await payExpense(expense.id, {
      amountPayed: data.amountPayed,
      paymentDate: data.paymentDate.toISOString(),
    });
    handleClose(false);
  }

  if (!expense) return null;

  return (
    <ResponsiveDialog open={open} onOpenChange={handleClose}>
      <ResponsiveDialogContent>
        <ResponsiveDialogHeader>
          <ResponsiveDialogTitle>Registrar pago</ResponsiveDialogTitle>
        </ResponsiveDialogHeader>

        <div className="flex flex-col gap-1 rounded-lg bg-muted px-3 py-2 text-sm">
          <span className="font-medium">{expense.description}</span>
          <span className="text-muted-foreground">
            Monto original: ${Number(expense.amount).toLocaleString("es-AR", { minimumFractionDigits: 2 })}
          </span>
        </div>

        <form id="pay-form" onSubmit={handleSubmit(onSubmit)} className="flex flex-col gap-4">
          <div className="flex flex-col gap-1.5">
            <label htmlFor="amountPayed" className="text-sm font-medium">
              Monto pagado
            </label>
            <input
              id="amountPayed"
              type="number"
              step="0.01"
              min="0"
              {...register("amountPayed", { valueAsNumber: true })}
              className="h-8 rounded-lg border border-input bg-background px-2.5 text-sm outline-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50"
            />
            {errors.amountPayed && (
              <span className="text-xs text-destructive">{errors.amountPayed.message}</span>
            )}
          </div>

          <div className="flex flex-col gap-1.5">
            <label className="text-sm font-medium">
              Fecha de pago
            </label>
            <Controller
              control={control}
              name="paymentDate"
              render={({ field }) => (
                <DatePicker
                  value={field.value}
                  onChange={field.onChange}
                  placeholder="Seleccionar fecha"
                />
              )}
            />
            {errors.paymentDate && (
              <span className="text-xs text-destructive">{errors.paymentDate.message}</span>
            )}
          </div>
        </form>

        <ResponsiveDialogFooter>
          <Button variant="outline" onClick={() => handleClose(false)} disabled={isSubmitting}>
            Cancelar
          </Button>
          <Button type="submit" form="pay-form" disabled={isSubmitting}>
            Confirmar pago
          </Button>
        </ResponsiveDialogFooter>
      </ResponsiveDialogContent>
    </ResponsiveDialog>
  );
}